Hey Tim,
Thanks for posting that ebay listing on that Apache. As you can see, the rear fender is mounted to the frame and that is the only year the rear fender is mounted that way. The 58' and 59' rear fender was mounted to the swing arm and went up and down with the rear wheel. I have always thought it was an ugly feature and never understood why they did it. I can't seem to find a picture of a stock 57' Apache. They were really a sharp looking bike, IMHO.
Originally, the fenders were either stainless or aluminum (don't remember which) and unpainted. The headlight was made to be "Quick Detachable". It had smallish chrome panels on the gas tank with the Indian head and name on each panel. The seat was made for rider & passenger. Main colors were red (mostly) and some were black. I've always thought that the Apache was probably the forerunner of the RE Interceptor. But, that's just my opinion. Those old twins had dual drum brakes in the front also, like the 1st year Suzuki GT750s. I've got a set of levers for an old Indian/Enfield twin. Take care.
Later on, Bill